[4] Cash Box reported in January 1954 that Day’s original recording “was losing a great deal of [radio] play because it ran something like 3:40 minutes.

[2] Kirby recalled: "[when] 'Secret Love'...was suggested by my recording manager Peter Sullivan[,] I said 'But that's already been done beautifully by Doris Day!'

We took a chance on it and decided that if it didn't chart it would at least be a prestige number, so we were thrilled when it sold over half a million copies in three weeks".

[9] "Secret Love" provided the title for a jukebox musical depicting Kirby's life story, which following its debut run at the Leeds City Varieties commencing 9 May 2008 played venues throughout the UK into 2009.

Willcox, who played the title role of Calamity Jane in the West End production of the stage musical in the summer of 2003, said of "Secret Love": "It's a great song to sing; it's very powerful, and emotionally—and musically—it's the pinnacle of the whole show.

"[27] In the Billy Paul version of "Me and Mrs. Jones" (1972), a saxophone is heard playing the first seven notes of "Secret Love", in the intro and outro of the song.

It was settled out of court, with Fain and Webster each receiving half of the proceeds for the Billy Paul version of the song.

Loretta Lynn covered a version of the song on both the 1967 release Singin' With Feelin' and again on her 2016 album Full Circle.